Adds style for acronyms (#4224).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3073 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/stylesheets/application.css

@@ -197,6 +197,7 @@ legend {color: #484848;}
 hr { width: 100%; height: 1px; background: #ccc; border: 0;}
 blockquote { font-style: italic; border-left: 3px solid #e0e0e0; padding-left: 0.6em; margin-left: 2.4em;}
 blockquote blockquote { margin-left: 0;}
+acronym  { border-bottom: 1px dotted; cursor: help; }
 textarea.wiki-edit { width: 99%; }
 li p {margin-top: 0;}
 div.issue {background:#ffffdd; padding:6px; margin-bottom:6px;border: 1px solid #d7d7d7;}